Comprehensive strategy for daily maintenance of bulldozer crane loader: Effectively extend the service life of equipment

Why is daily maintenance of bulldozer cranes and loaders important?

In engineering construction and mine, port and other operation scenarios,Crane, bulldozer, loaderThey are all heavy equipment used with high intensity. Many equipment is scrapped early, not because the main components have reached the design life, but because small problems caused by inadequate daily maintenance have accumulated into major failures. do a good jobdaily maintenance, can effectively reduce sudden downtime, control maintenance costs, andEffectively extend equipment life。The following is a description of the common maintenance techniques for these three types of equipment combined with actual operating experience.

Daily maintenance of engine and power system

The engine is the heart of the equipment, and daily inspection must be put first. Before starting work every day, check the oil level and coolant level to see if there are any traces of leakage. If the air filter element is blocked, it will lead to insufficient air intake and insufficient combustion, which will aggravate wear on the cylinder liner and piston rings in the long run. Therefore, the air filter element should be cleaned or replaced regularly, especially in dusty construction sites, and checked at least once a week.

Fuel system and filter maintenance

Impurities and moisture in diesel fuel can directly affect the life of fuel injectors and high-pressure oil pumps. It is recommended to fill up the fuel after work every day to reduce condensation on the inner wall of the fuel tank; replace the diesel filter every 250 hours or so, and regularly drain the water in the oil-water separator. oncraneGenerally speaking, if you are on standby for a long time, you should also start running for a period of time every week to avoid aging of oil circuits and seals.

Hydraulic system maintenance points

hydraulic system isloaderandcraneAt the core of action execution, the cleanliness of hydraulic oil directly determines the life of valve banks, cylinders and pumps. Daily observe whether the hydraulic oil level is within the scale range and check whether the hydraulic pipeline has cracks or oil leakage. When changing oil, you must use the grade recommended in the equipment manual. Different brands of hydraulic oils cannot be mixed. The hydraulic oil filter element should be replaced according to the maintenance cycle. Blocking the oil return filter element will cause the back pressure to increase and cause damage to the oil seal.

Oil cylinder and joint inspection

• Check the surface of the piston rod of each oil cylinder for scratches, rust or abnormal oil films every day.

• Check whether the hydraulic joints are loose, and tighten or replace the sealing rings immediately if oil leaks are found.

• After heavy-duty operation of the telescopic boom and luffing oil cylinder, the attached sediment should be removed to prevent the sealing rings from being scratched.

Chassis, walking and working equipment maintenance

forbulldozerIn general, the wear of the walking mechanism is the most obvious. Chain links, support rollers, idler wheels and drive wheel teeth need to be checked regularly for tension and lubrication. If the track is too loose, it will easily derail, and if it is too tight, it will accelerate the wear of the pin sleeve. Clean up the soil and gravel on the track after work every day to avoid abnormal wear caused by hard objects getting stuck into the supporting wheels.

The tires or rims and transmission shaft connecting bolts of the loader must also be visually inspected every day. If the bolts are found to be loose, they must be tightened promptly according to the specified torque. The pin shaft and bushing of the working device are usually equipped with grease nozzles, and grease should be added every shift to ensure that the pin shaft rotates flexibly and there is no dry friction and abnormal noise.

Operating habits directly affect maintenance results

Much of the wear and tear is caused by improper operation. The bulldozer should try to avoid in-situ steering and unilateral loading. Do not hit the pile with impact when the loader is digging. Before lifting, make sure that the legs are fully extended and the steel plates are padded. Rapid acceleration, sudden stop and overloading operations can multiply the stress on the transmission system and structural components. Daily maintenance is not only about changing oil and adding water, but also includes developing the habit of smooth operation. Idle for 3-5 minutes after each start to allow the oil and hydraulic oil to fully circulate. Especially in cold conditions, high-speed operations should be avoided.

Lubrication and cleaning: the easiest to ignore but the most effective

Correct lubrication can significantly reduce the wear rate of friction pairs. onCrane, bulldozer, loaderGenerally speaking, although there are not many centralized lubrication points, every place is crucial. Common filling points include: pin shafts of various working devices, slewing bearings, transmission shaft crosses, water pump bearings, etc. uselithium greaseOr the grease specified in the equipment description to avoid thinning and loss caused by mixing different soap-based greases.

Remember one principle: cleanliness is the best maintenance. Oil, sand and debris can mask early leaks and accelerate the aging of seals and electrical components.

Do a simple rinse after work every day, but do not use high-pressure water guns to directly impact electrical connectors, respirators and oil ports to prevent moisture from entering the system. After rinsing, the equipment should be started to run for a few minutes to allow residual water to evaporate.

Electrical system and seasonal maintenance reminders

Oxidation of battery piles and damage to lines are common sources of failure. Check whether the battery liquid level (except maintenance-free batteries) and pile head are firmly connected every day, and apply Vaseline to prevent oxidation. In low-temperature areas in winter, hydraulic oil and diesel oil suitable for low temperatures should be used and preheated before starting; when high temperatures in summer, pay attention to check whether the radiator fins are blocked by catkins and dust, and use compressed air to blow them out in time.

Summary: Turn daily maintenance into a fixed process

The daily maintenance of cranes, bulldozers, and loaders is not complicated. The key lies in persistence and standardization. The operator can make a pictureDaily checklist, check the engine, hydraulics, walking, lubrication, electrical and other items item by item. only whenDaily maintenance skillsOnly by implementing it in every shift and every day can we truly achieve it.Effectively extend equipment life, allowing equipment to maintain high attendance and low maintenance costs for a long time.